<!DOCTYPE html>
<html>

	<head>
		<meta charset="utf-8">
		<title></title>
	</head>

	<body>
		<!--
        	float布局，如果不够就会往下挤。剩的距离不够了，就往回跑
        -->
		<div style="float: left;width: 400px;height: 400px;background-color: salmon;">

		</div>
		<div style="float: left;width: 400px;height: 400px;background-color: antiquewhite;">

		</div>
		<div style="float: left;width: 400px;height: 400px;margin-left: -150px;background-color: aquamarine;">

		</div>
	</body>

</html>